Balroglanis Macracanthus (Balroglanis macracanthus) is a ray-finned fish. It inhabits freshwater waters in benthic environments. This species can reach a maximum total length of 13 cm. With a trophic level of 3.4, it is a low-level carnivore, feeding on invertebrates and small organisms.
Dorsal spines (total): 1; Dorsal soft rays (total): 5; Anal soft rays: 7; Vertebrae: 37. First nuchal plate absent; the supraoccipital bone sutured to the 2nd nuchal plate. First dorsal fin spine elongated, 28-35% SL. Coracoid process covered with skin, not visible externally.
Behavioural data for Balroglanis Macracanthus is currently being reviewed.
Freshwater; demersal. Tropical South America: Upper Negro River basin in Brazil.
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